25319481 has 16 divisors (see below), whose sum is σ = 38430720. Its totient is φ = 14677520.

The previous prime is 25319473. The next prime is 25319513. The reversal of 25319481 is 18491352.

It is not a de Polignac number, because 25319481 - 2³ = 25319473 is a prime.

It is a super-2 number, since 2×25319481² = 1282152236218722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25319431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15921 + ... + 17438.

It is an arithmetic number, because the mean of its divisors is an integer number (2401920).

Almost surely, 2^25319481 is an apocalyptic number.

It is an amenable number.

25319481 is a deficient number, since it is larger than the sum of its proper divisors (13111239).

25319481 is a wasteful number, since it uses less digits than its factorization.

25319481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33396.

The product of its digits is 8640, while the sum is 33.

The square root of 25319481 is about 5031.8466789043. The cubic root of 25319481 is about 293.6420628940.

The spelling of 25319481 in words is "twenty-five million, three hundred nineteen thousand, four hundred eighty-one".